102142987 has 8 divisors (see below), whose sum is σ = 109634256. Its totient is φ = 94816512.

The previous prime is 102142979. The next prime is 102143003. The reversal of 102142987 is 789241201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 102142987 - 2³ = 102142979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102142087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39913 + ... + 42394.

It is an arithmetic number, because the mean of its divisors is an integer number (13704282).

Almost surely, 2^102142987 is an apocalyptic number.

102142987 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

102142987 is a deficient number, since it is larger than the sum of its proper divisors (7491269).

102142987 is an equidigital number, since it uses as much as digits as its factorization.

102142987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82397.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 102142987 is about 10106.5813705723. The cubic root of 102142987 is about 467.4510984338.

The spelling of 102142987 in words is "one hundred two million, one hundred forty-two thousand, nine hundred eighty-seven".